. to find more boxes that big check atyour local aplincestore. ask ifthey have any frig boxes. or check at a new house being built. most of tyhetime they just throw away theboxesThere is another part to the genius of the Box-O-Sox project.
Because it is a cardboard box and I know where I can get my hands on many more just like it, I can cut the bottom of the origional box off and stack it on another box allowing me to grow my plant a little bigger.
Also if i needed to i could bust out the refridgerator box and make a Box-O-Sox Sr.